Double runner.



J. E. CHBNETTE.

DOUBLE RUNNER. APPLICATION FILED JAN.2,1912.

Patented Nov. 18, 1913.

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HoanuJo J. E. CHBNETTE. DOUBLE RUNNER. APPLICATION HLED JAN. 2, 1912.

Patented Nov. 18, 1913.

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arto-Muy J. E. CHBNETTE. DOUBLE RUNNER. APPLIGATION FILED 1mm, 1912.

1,079 ,1 64. Patented Nov. 913.

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Jesse E. ennimr'rn, or MONTPELIER, vea-Monat.

DOUBLE RUNNER.

To all whom t may concern.'

Be it known that I, Jnssn E. CHnNE'rrE, a citizen of the United States,residing at Montpelier, in the county of Washington andfStateofrVermont, have invented certain. new and useful' Improvements 1nDouble Runners; and I do declare the f ollowing-.to be. a full, clear,and exact desemption of the invention, such as will enable othersskilled in the artto which it appertai-ns to make and use the same. D

This invention relates to improvements in combinedrunners and tractionattachments forvehicles.

One object of the invention is to provide an' attachmentof thischaracter comprising double runners connected by an integral web andhaving.- revolubly mounted therein sprockets with which is engaged atraction chain havingthereon a plurality. of shoes adapted -to engagethe ground :or to dig into the snow( or ice whereby the chain is enabledtoobtain a firm grip onthe surface over which the xvehicle istraveling.-

Another@ object is .to Yprovide. a runner and traction attachmentadapted to be mounted onan axle spindle to take the place of the wheelthereon.

With-:these and other objects in view the invention consists of certainnovel `features of construction, and the combination and arrangement ofparts as will be more fully described yand claimed.

In the aecompanyingdrawings; Figure 1 is -alside viewof a runner-andtraction device constructediin accordance ywith the invention; Fig. 2 isanend View thereof showing the same applied to theaXle of a vehicle;Eig.- 3 is a vertical cross sectionallview en the line 3 3 lof Fiigl.;Fig. 4 is an enlarged vertical sectionalview through a portion of themain sprocket'and the runners showing the construction` and' arrangementof the sameY when keyed toan axle and driving shaft; Fig. 5 is a similarview showingthe construction and f arrangement of the parts whendrivenby a chain drive; Fig. 6 is a side View of the runners with thesprockets, gears, and chains removed, parte being broken away and insect-ion.y Fig. 7 is. an end view thereof; Fig. 8 is a side view of themain drivingfgear and sprocket; Fig.' 9 1s a cross sectional Viewthereof; Fig. 10 is. al

side view offlthe driving'pinion andsmaller sprocket; Fig. 11; is acrossfsectienal` View thereof.; Fig. 12de a detail sideview oftheSpecification of Letters Patent.

Application filed January 2, 1912.

Patented Nov. 18, 1 913. serial ivo. 668,986.

view through one side of the runner to more thereof; Fig. 14 is a sideView of one of the tractionshoes; Fig. 15 is an end view there, of; and,Fig. 16 1s an inverted perspective View of the same.

Referring more particularly to the drawings, my improved runnercomprises paralbars 1 spaced a suitable distance apart and connected attheir inner edges by. 'an integral web l".v The runner bar comprises aAfiat ground engaging portion 2, curved or rounded ends 3 and 4,andinclined upper members 5 as shown. portions 2 of the runner and thetop tions 5 where the same are the 'greatest distance apartlby pairs ofverticali disposed sup. porting bars (Shaving on tli'eir inner edgeslateral outwardly projecting bea1-ing,flangcs 7 which are curvedoutwardly between their ends to form a bearing 8 to receive the axlespindle and the runner attaching member whereby the runner isatta'chedto the axle as will be hereinafter more fully described.v Thebars `6 are firmly braced and 'secured to the opposite ends of therunners by fronti and rear longitudinally disposed combined braceandbearing bars 9 and 10, the inner. ends of` which are riveted to theplates` 6 while the outerends thereof are riveted to the, flanges of thecurvedlends ofthe runneri bars. The outer portion of the bar-sl) and 10are disposed horizontally and 'have formed therein bearing openings 11and 1.2 the purpose of which will be hereinafter described. The runnerbars and the bearing bars 9 and 10 are braced by a series of.di'.agonally arranged brace bars 13 securedto the flanges of the upper andlowermembers as shown. The runner* bars are braced laterally by inclinedbrace bars 13 secured to the supporting bars 6 and to collars 13?arranged on the vehicle axle as shown. Rcvolubly engaged with flanges 8of the inner Section of a bearing -boX and runner attaching sleeve 14"which, when the lrunners are applied to a drivingaxle, is adapted axlespindle as shown in Fig. 4 of the draw; ings ,and which when l appliedto stationaryV axlesis revolublymountedfen the spindle.

supportinfr and driving sleeve for the mainV sprocket; 41g. 13 1s adetail cross sectional clearly show the cross sectional formation.-

lel channel iron inner and outer sections o rj The ground engaging.'`

are connected together. at the point:

of the runner, bars and to saidbearing.barsV the hearing the runner is.

to be keyed. to the.

^ 4 mayhave applied thereto a braking mechanism and which when employedas shown in Fig. 5 has bolted or otherwise secured -thereto a drivingsprocket with which the chain drive of the vehicle is engaged. When therunner is thus applied to the box 14 and the latter engaged with thespindle of the axle, a ball bearing 16 is arranged between the bearingflange 8 of the inner runner section and a ball bearin 17 is preferablyarranged between the bearlng lia-nge 8 of the outer runner sectie-n, andthe outer end of the spindle as shown. The axle spindle is provided withthe usual tap or retaining nut 18 and the outer end of the bearingflange 8 of the outer runner section is preferably internally threadedand has secured therein a cap 19 which covers the tap 18 and outer endof the spindle. The portion of the sleeve or box between the sectlons ofthe runners is externally threaded and onto said threaded surface isscrewed the main driving sprocket 20 of a traction mechanism hereinafterdescribed, said sprocket being thus driven by the sleeve or box eitherthrough the axle as shown in Fig. 4 or by a chain drive as described inconnection with Fig. 5. The sprocket a20 in. addition to its teeth forengaging the traction chain has annular series of teeth 21 arranged onopposite sides of its body and constituting driving gears connected by apair of chains 22 with similar series of teeth 23 constituting pinionsformed on the sides of a supplemental traction sprocket 24 revolublymounted in the bearing apertures 12 of the brace and bearing bars 10 ofthe runners, said sprocket and its pinions 24 when thus arranged beingadapted to work in the rear curved or rounded ends of the runners asshown. The driving gears 21 and driven pinions 23 are smaller than theirrespective sprockets, with the result that the chain or other connectionbetween the gears and pinions are at their lower sides elevated abovethe first-engaging stretch of the traction chain so that dirt in thelatter is not communicated to the former.

Revolubly mounted in the bearings 11 of the bearing and bracing bars 9and in the opposite ends 3 of the runners is an idle sprocket 25 withwhich and with the main sprocket l20 and supplemental sprocket 24 isengaged a traction sprocket chain 26, said chain being adapted to travelin the space between the channel bars 1 of the runners and on the web1a. It will be noted that where the sprockets are located the web, 1a

which connects the channel bars is cut out to form passages suiiicientlylong to permit the teeth of said sprocket to project through the web andbetween the channels to engage the links of the sprocket chain 26. Atsuitable positions and preferabl at the ends of the passages in the webs'or the sprockets 24 and 25 the channel iron runner bars are rigidlybraced by channel iron brace bars 1b which are riveted or otherwiserigidly secured to the inner sides of the runner bars as shown. l

Secured to the traction chain 26 and preferably in alternate spacesbetween its links are shoes 28, each of which preferably comprises abody portion in the form of a flat block having its ends slightlyreduced and rounded to form integral attaching lugs 29 which are adaptedto be engaged by the adjoining links -ofv the chain and which areriveted or otherwise pivotally connected to said links, thus formingpractically a part of the chain. The outer edges of the blocks extendbeyond the outer edges of the chain and have formed thereonlongitudinally disposed V-shaped ground engaging ribs 30 and said edgeshave also rigidly secured thereto or formed integral therewithtransversely disposed ground engagin bars 31 having sharp or V-shapedouter e ges which together with the V-shaped ribs 30 bite into theground or surface over which the runner is passing and thus insure afirm grip on said surface. The bars 31 extend beyond the opposite sidesof the blocks to a considerable distance to provide an increased griping or traction engagement with t e ground. By providing both thelongitudinal gripping ribs 30 and the transverse ripping bars 31 aresistance is offered in oth directions and the shoes` thus preventedfrom slipping either longitudinally or laterally.

The sprockets 24 and 25 are adjustably secured in their bearings in thebars 10 and 9 by adjusting screws 32 whereby the slack is taken up inthe traction chain and in the drive chain 22 as will be readilyunderstood. From the above description it will be seen that when poweris applied to the shaft or hub of the main sprocket 20, its teeth engagethe traction chain as indicated at the top of Fig. 1 and drive saidchain in either direction around the runner; and its driving gears 21,connected by the chains 22 with the driving pinions 23, cause thesupplemental sprocket 24 to rotate in the same direction as the mainsprocket 20. The teeth of this supplemental sprocket engage the tractionchain at a point where VJhe latter makes a sharp bend as seen, andtherefore the links of this chain are in engagementl with said teeth fora distance almost half way around the sprocket. It follows that.

the rotation of the latter simultaneously assists in the movement of thetraction chain over the runner in either direction, and yet by theconstruction described it is not necessary to apply the power to morethan one point which by preference is the axle or ub of the mainsprocket and the main driving gears.

Various changes in the formfproportion and the minor details ofconstruction may be resorted to without departing from the principle orsacrificing any of the advanta es of the invention as claimed.

aving thus described my invention, what I claim 1s:

1. In a traction device of the class described, the combination with arunner comprising two spaced channeled members connected byan integralweb so as to produce a lerigheral groovearound the runner, the we I avmgopenings at points, and sprockets w ose teeth project through saidopenings; of a chain whose links travel in said groove and engage saidteeth, and shoes each consisting of a body pivoted within the line ofthe chain and traveling within said groove, and transverseearth-engaging portions carried by the body and projecting laterallyoutward over the channel members ofthe runner.

2. In a traction device of the class described, the combination with asleeve adapted to be mounted on an axle spindle, means for rotating saidsleeve, a main sprocket fast on the latter, and a runner in which thesleeve is journaled; of a traction chain passing around the periphery ofthe runner and engaging the teeth of said sprocket, a supplementalsprocket journaled in the runner and its teeth also engaging said chain,and means for connecting the main and supplemental sprockets so thatpower from the former will be im arted to the latter, for the purposeset fort 1.

In testimony whereof I have hereunto set my hand in presence of twosubscribing witnesses.

JESSE E. CHENETTE.

Witnesses:

PERLIE D. SMITH,

BENJAMIN A. SUMNER.

copies of this patent may be obtained for ve cents each, by addressingthe "Commissioner of Patents,

Washington, D. C.

